Added a safeguard for invalid uploads causing fatals in API endpoints. #80991

Job	Run time
Determine tests matrix	8s
Static analysis	8m 9s
Check plugin monorepo dep versions	31s
Storybook tests	3m 0s
PHP tests: PHP 7.2 WP latest	4m 35s
PHP tests: PHP 7.3 WP latest	3m 49s
PHP tests: PHP 7.4 WP latest	3m 59s
PHP tests: PHP 8.0 WP latest	4m 17s
PHP tests: PHP 8.1 WP latest	3m 58s
PHP tests: PHP 8.2 WP latest	3m 20s
PHP tests: PHP 8.3 WP latest	3m 34s
PHP tests: PHP 8.4 WP latest	3m 23s
PHP tests: PHP 8.2 WP previous	3m 54s
PHP tests: PHP 8.2 WP trunk	7m 25s
PHP tests: PHP 7.4 WP latest with WooCommerce	2m 49s
PHP tests: PHP 8.1 WP latest with wpcomsh	4m 7s
JS tests	2m 22s
Code coverage	6m 55s
	1h 10m 15s

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